Powered ascender and descender



FIG. 1 is a perspective view of a powered ascender and descender showing my new design;

FIG. 2 is a left-side elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right-side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is front elevational view thereof; and,

FIG. 7 is a rear elevational view thereof.

The broken lines show portions of a powered ascender and descender that form no part of the claimed design. 

CLAIM The ornamental design for a powered ascender and descender, as shown and described. 